TC7109 TelCom, TC7109 Datasheet - Page 9

• Manufacturer Part Number: TC7109
• Description: 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS
• Manufacturer: TelCom

12-BIT P-COMPATIBLE
ANALOG-TO-DIGITAL CONVERTERS
FOR OVERRANGE INPUT
TELCOM SEMICONDUCTOR, INC.
INTEGRATOR OUTPUT
INTEGRATOR OUTPUT
SECTION
ANALOG
FOR NORMAL INPUT
INTERNAL CLOCK
INTERNAL LATCH
STATUS OUTPUT
TO
COMP OUT
NUMBER OF COUNTS TO ZERO CROSSING
DE ( )
INT
AZ
ZI
COUNTS
TEST
17
PHASE I
2048
MIN
STATUS
AZ
PROPORTIONAL TO V IN
2
INTEGRATOR
CONVERSION
SATURATES
Figure 3. Conversion Timing (RUN/HOLD Pin High)
POL
CONTROL
3
LOGIC
BYTE OUTPUTS
OR
4
HIGH-ORDER
PHASE II
COUNTS
5
12
FIXED
B
2048
INT
HOLD
26
RUN/
Figure 4. Digital Section
6
11
B
14 THREE-STATE OUTPUTS
7
10
B
22
OSC
IN
8
B
9
OSCILLATOR
14 LATCHES
AND CLOCK
CIRCUITRY
23
OSC
OUT
9
12-BIT COUNTER
B
8
10
24
OSC
LATCH
SEL
CLOCK
B
7
11
BYTE OUTPUTS
25
BUFF
B
6
OSC
OUT
ZERO CROSSING
OCCURS
LOW-ORDER
ZERO CROSSING
DETECTED
12
AFTER ZERO CROSSING, ANALOG SECTION
WILL BE IN AUTO-ZERO CONFIGURATION
COUNTS
CROSSING
PHASE III
B
5
NO ZERO
4096
MAX
MODE
13
21
DE
B
4
HANDSHAKE
14
LOGIC
B
3
15
B
2
SEND
16
27
B
1
ZI
AZ
AZ
GND
1
ZERO INTEGRATOR
PHASE FORCES
INTEGRATOR
OUTPUT TO 0V
18
19
20
LBEN
HBEN
CE/LOAD
TC7109A
TC7109
3-99
1
2
3
4
5
6
7
8